1. The Claustrum is a telencephalic, pallial subcortical structure which has been identified in all eutherian and metatherian mammals

2. Commissures are fiber tracts that are defined to connect corresponding cortical areas of both telencephalic hemispheres with each other

3. Complete apallic syndromes differ from incomplete similar syndromes which show remnants of telencephalic functions (severe dementia, global agnosia, etc.), including an abnormal EEG.

4. According to the degree of seperation of the telencephalic grey matter and formation of the anterior horns, severity of the malformation can be estimated.